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Journal of the Air & Waste Management Association

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https://www.readbyqxmd.com/read/29999477/future-year-ozone-source-attribution-modeling-study-using-cmaq-isam
#1
Susan Collet, Toru Kidokoro, Prakash Karamchandani, Jaegun Jung, Tejas Shah
No abstract text is available yet for this article.
July 12, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29993352/updating-the-saprc-maximum-incremental-reactivity-mir-scale-for-the-united-states-from-1988-to-2010
#2
Melissa A Venecek, William P L Carter, Michael J Kleeman
Ozone reactivity scales play an important role in selecting which chemical compounds are used in products ranging from gasoline to pesticides to hairspray in California, across the United States and around the world. The SAPRC box model that calculates ozone reactivity uses a representative urban atmosphere to predict how much additional ozone forms for each kg of compound emission. This representative urban atmosphere has remained constant since 1988 even though more than 25 years of emissions controls have greatly reduced ambient ozone concentrations across the U...
July 11, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29985784/integrating-site-specific-dispersion-modeling-into-life-cycle-assessment-focus-on-inhalation-risks-in-chemical-production
#3
Shen Tian, Melissa Bilec
It has become increasingly important for environmental managers to evaluate the human health (HH) impact of chemicals in their supply chain. Current Life Cycle Assessment (LCA) methods are limited because they often only address the HH impact at large geographical scales. This paper aims to develop a method that derives a regionalized life cycle inventory dataset and site-specific air dispersion modeling to evaluate the HH impact of chemicals along the life cycle phases at finer geographical scales to improve decision making, with focus on inhalation pathway...
July 9, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29953328/cesium-emissions-from-laboratory-fires
#4
Wei Min Hao, Stephen Baker, Emily Lincoln, Scott Hudson, Sang Don Lee, Paul Lemieux
If a radiological incident such as a nuclear power plant accident, a radiological dispersal device, or detonation of an improvised nuclear device occurs, significant areas may be contaminated. Initial cleanup priorities would likely focus on populated areas, leaving the forested areas to pass several seasons where the overhead canopy materials would fall to the forest floor. In the event of a wildfire in a radionuclide-contaminated forest, some radionuclides would be emitted in the air while the rest would remain in the ash...
June 28, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29939829/fungal-bioaerosols-in-biomethanization-facilities
#5
Hamza Mbareche, Marc Veillette, Marie-Ève Dubuis, Bouchra Bakhiyi, Geneviève Marchand, Joseph Zayed, Jacques Lavoie, Guillaume J Bilodeau, Caroline Duchaine
Biomethanization is a new technology used for green-waste valorization where organic waste is biodegraded by microbial communities under anaerobic conditions. The main product of this type of anaerobic digestion is a biogas used as an energy source. Moving and handling organic waste may lead to the emission of high concentrations of bioaerosols. High exposure levels are associated with adverse health effects amongst green environment workers. Fungal spores are suspected to play a role in many respiratory illnesses...
June 25, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29902119/geopolymers-as-a-material-suitable-for-immobilization-of-fly-ash-from-municipal-waste-incineration-plants
#6
Michał Łach, Dariusz Mierzwiński, Kinga Korniejenko, Janusz Mikuła, Marek Hebda
This paper discusses the possibility of using the process of geopolymerization to immobilize the ash from the municipal waste incineration plant. Fly ash used in the related research came from the same incineration plant, one of the biggest in Poland. The examination was conducted on the waste samples labeled as 190107* and 190113*. The comparison included such properties of waste as e.g.: chemical composition, dioxin content, size and morphology of particles. The waste was solidified in geopolymer matrix made from: (i) fly ash from the combustion of bituminous coal or (ii) metakaolin...
June 14, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29889623/no-x-instrument-intercomparison-for-laboratory-biomass-burning-source-studies-and-urban-ambient-measurements-in-albuquerque-new-mexico
#7
Caroline Allen, Christian M Carrico, Samantha L Gomez, Peter C Andersen, Andrew A Turnipseed, Craig J Williford, John W Birks, Dwayne Salisbury, Richard Carrion, Dan Gates, Fabian Macias, Thom Rahn, Allison C Aiken, Manvendra K Dubey
Understanding nitrogen oxides (NOx  = NO + NO2 ) measurement techniques is important as air-quality standards become more stringent, important sources change, and instrumentation develops. NOx observations are compared in two environments: source testing from the combustion of southwestern biomass fuels and urban, ambient NOx . The latter occurred in the urban core of Albuquerque, NM at an EPA NCORE site during February-March 2017, a relatively clean photochemical environment with ozone (O3 ) < 60 ppb for all but 6 hours...
June 11, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29870681/comparing-emission-rates-derived-from-a-model-with-those-estimated-using-a-plume-based-approach-and-quantifying-the-contribution-of-vehicle-classes-to-on-road-emissions-and-air-quality
#8
Junshi Xu, Jonathan Wang, Nathan Hilker, Masoud Fallah-Shorshani, Marc Saleh, Ran Tu, An Wang, Laura Minet, Christos Stogios, Greg Evans, Marianne Hatzopoulou
This study presents a comparison of fleet average emission factor (s) derived from a traffic emission model with EFs estimated using plume-based measurements, including an investigation of the contribution of vehicle classes to carbon monoxide (CO), nitrogen oxides (NOx ), and elemental carbon (EC) along an urban corridor. To this end, a field campaign was conducted over one week in June 2016 on an arterial road in Toronto, Canada. Traffic data were collected using a traffic camera and a radar, whereas air quality was characterized using two monitoring stations: one located at ground level and another at the rooftop of a four-story building...
June 5, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29781775/ambient-temperature-co-digestion-of-low-solids-municipal-and-industrial-waste-mixtures-insights-from-molecular-analyses
#9
Ramin Yazdani, Kyuhwan Shim, Zhi Chen, Christy Cheung, Matthew D Summers, Douglas W Williams, Reinhard Seiser, Susan K De Long
No abstract text is available yet for this article.
May 21, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29771631/need-for-a-marginal-methodology-in-assessing-natural-gas-system-methane-emissions-in-response-to-incremental-consumption
#10
Michael Mac Kinnon, Zahra Heydarzadeh, Quy Doan, Cuong Ngo, Jeff Reed, Jacob Brouwer
Accurate quantification of methane emissions from the natural gas system is important for establishing greenhouse gas inventories and understanding cause and effect for reducing emissions. Current carbon intensity methods generally assume methane emissions are proportional to gas throughput so that increases in gas consumption yield linear increases in emitted methane. However, emissions sources are diverse and many are not proportional to throughput. Insights into the causal drivers of system methane emissions, and how system-wide changes affect such drivers are required...
May 17, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29746799/energy-consumption-and-energy-saving-potential-analysis-of-pollutant-abatement-systems-in-a-1000mw-coal-fired-power-plant
#11
Hang Yang, Yongxin Zhang, Chenghang Zheng, Xuecheng Wu, Linghong Chen, Xiang Gao, Joshua S Fu
The pollutant abatement systems are widely applied in the coal-fired power sector and the energy consumption was considered an important part of the auxiliary power. An energy consumption analysis and assessment model of pollutant abatement systems in a power unit was developed based on the dynamic parameters and technology. The energy consumption of pollutant abatement systems in a 1000 MW coal-fired power unit which meet the ultra-low emission limits and the factors of operating parameters including unit load and inlet concentration of pollutants on the operating power were analyzed...
May 10, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29737925/electricity-generation-from-landfill-gas-in-turkey
#12
Nezih Kamil Salihoglu
Landfill gas (LFG)-to-energy plants in Turkey were investigated, and the LFG-to-energy plant of a metropolitan municipal landfill was monitored for 3 years. Installed capacities and actual gas engine working hours were determined. An equation was developed to estimate the power capacity for LFG-to-energy plants for a given amount of landfilled waste. Monitoring the actual gas generation rates enabled determination of LFG generation factors for Turkish municipal waste. A significant relationship (R = 0.524, p < 0...
May 8, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29714646/analysis-of-the-number-of-flux-chamber-samples-and-study-area-size-on-the-accuracy-of-emission-rate-measurements
#13
Colin L Y Wong
Monte Carlo simulations were conducted on a set of flux chamber measurements at a landfill to estimate the relationship between the number of flux chamber samples and study area size on the emission rate measurement accuracy. The spatial variability of flux was addressed in the study by utilizing an existing flux chamber measurement data set that is one of the most dense flux chamber sampling arrays published to date for a landfill. At a probability of 95%, the Monte Carlo simulations indicated that achieving an accuracy within 10% with the flux chamber method is highly unlikely...
May 1, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29708862/assessment-of-nitrogen-oxides-and-ground-level-ozone-behavior-in-a-dense-air-quality-station-network-case-study-in-the-lesser-antilles-arc
#14
Thomas Plocoste, Jean-François Dorville, Stéphanie Monjoly, Sandra Jacoby-Koaly, Maïna André
This paper presents a study on ground-level ozone (O3 ), nitrogen oxides (NOx  = NO + NO2 ) concentration and their variabilities in the ambient air of three sites of a tropical archipelago moderately urbanized. Statistical analysis were performed on quite complete (> 80%) five years of measurements (2008-2012). There are few studies on those pollutants and their seasonal behavior in the Caribbean area where pollution level and cities configuration are different from megacities. Analyses are focus on pollutant variations at the scale of the day, the week and the seasons using hourly data...
April 30, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29708470/comparison-of-physical-technologies-for-biomass-control-in-biofilters-treating-gaseous-toluene
#15
Meng-Fei Han, Can Wang, Hang Liu
Excessive accumulation of biomass within gas-phase biofilters often results in the deterioration of removal performance. Compared with chemical and biological technologies, physical technologies are more effective in removing biomass and inducing less inhibition of the biofilter performance. This study applied different physical technologies, namely, air sparging, mechanical mixing, and washing with water at various temperature, to remove excess biomass in biofilters treating toluene. Filter pressure drop, removed dry biomass, biofilter performance, and microbial metabolic characteristics were analyzed to evaluate the effectiveness of the methods...
April 30, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29701537/how-best-management-practices-affect-emissions-in-gas-turbine-power-plants-an-important-factor-to-consider-when-strengthening-emission-standards
#16
Jinghai Zeng, Min Xing, Min Hou, Glenn C England, Jing Yan
The Beijing Municipal Environmental Protection Bureau (EPB) is considering strengthening the Emission Standard of Air Pollutants for Stationary Gas Turbines, originally published in 2011 (DB11/847-2011), with a focus on reducing nitrogen oxides (NOx) emissions. A feasibility study was conducted to evaluate the current operation of 12 existing combined-cycle gas turbine power plants and the design of two new plants in Beijing and their emission reduction potential, in comparison with a state-of-the-art power plant in California...
April 27, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29701507/metallic-characteristics-of-pm-2-5-and-pm-2-5-10-for-clustered-aeolian-dust-episodes-occurred-in-an-extensive-fluvial-basin-during-rainy-season
#17
Chung-Shin Yuan, Chun-Chung Lu, Hua-Zhen Shen, Tsung-Chang Li
No abstract text is available yet for this article.
April 27, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29693499/adsorption-of-mercury-by-activated-carbon-prepared-from-dried-sewage-sludge-in-simulated-flue-gas
#18
Jeongmin Park, Sang-Sup Lee
Conversion of sewage sludge to activated carbon is attractive as an alternative method to ocean dumping for the disposal of sewage sludge. Injection of activated carbon upstream of particulate matter control devices has been suggested as a method to remove elemental mercury from flue gas. Activated carbon was prepared using various activation temperatures and times and was tested for their mercury adsorption efficiency using lab-scale systems. To understand the effect of the physical property of the activated carbon, its mercury adsorption efficiency was investigated as a function of its Brunauer-Emmett-Teller (BET) surface area...
April 25, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29676967/municipal-solid-waste-generation-and-disposal-in-robe-town-ethiopia
#19
Duguma Erasu, Tesfaye Faye, Amaha Kiros, Abel Balew
The amount of solid waste generated in developing countries is rising from time to time due to economic growth, change in consumer behavior and lifestyles of people. But it is hard to manage and handle the increase of solid waste with existing waste management infrastructure. Thus, the management system of solid waste is very poor and become a serious problem. The main purpose of this study is to quantify the volume of solid waste generated and investigate factors affecting generation and disposal of wastes in the study area...
April 20, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29676965/the-influence-of-wind-speed-on-airflow-and-fine-particle-transport-within-different-building-layouts-of-an-industrial-city
#20
Dan Mei, Meng Wen, Xuemei Xu, Yuzheng Zhu, Futang Xing
In atmospheric environment, the layout difference of urban buildings has a powerful influence on accelerating or inhibiting the dispersion of particle matters (PM). In industrial cities, buildings of variable heights can obstruct the diffusion of PM from industrial stacks. In this study, PM dispersed within building groups was simulated by Reynolds-averaged Navier-Stokes equations coupled Lagrangian approach. Four typical street building arrangements were used: (a) a low-rise building block with Height/base H/b = 1 (b = 20 m); (b) step-up building layout (H/b = 1, 2, 3, 4); (c) step-down building layout (H/b = 4, 3, 2, 1); (d) high-rise building block (H/b = 5)...
April 20, 2018: Journal of the Air & Waste Management Association
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